<template>
  <el-container>  <!-- elcon -->
    <el-aside width="200px">
      <el-menu mode="vertical" style="height: 100vh;" :default-active="$route.path" router>  <!-- elmn -->
        <el-submenu v-for="(item, index) in menu.items"
          :index="`menu-item-${index}`"
          :key="`menu-item-${index}`">
          <template slot="title">{{item.title}}</template>
          <el-menu-item v-for="(subItem, subIndex) in item.items"
            :key="`menu-item-${index}-${subIndex}`"
            :index="subItem.path">
              {{subItem.title}}
          </el-menu-item>
        </el-submenu>
      </el-menu>
      
    </el-aside>
    <el-container>
      <el-header>
        <h3>全栈之巅 - 后台管理界面</h3>
      </el-header>
      <el-main>
        <router-view :key="$route.path"></router-view>  <!-- :key="$route.path"避免相同组件冲突 -->
      </el-main>
    </el-container>
  </el-container>
  
</template>

<script lang="ts">
import { Vue, Component } from 'vue-property-decorator'

@Component({})
export default class Main extends Vue {
  menu = {
    items: [
      {
        title: '内容管理',
        items: [
          { title: '首页', path: '/'},
          { title: '课程管理', path: '/courses/list'},
          { title: '课时管理', path: '/episodes/list'},
        ]
      },
      {
        title: '运营管理',
        items: [
          { title: '首页', path: '/'},
          { title: '用户管理', path: '/users/list'},
        ]
      }
    ]
  }
}
</script>

<style>

</style>
